Envrionment News Service: In preparation for the UN climate change conference in Copenhagen in December 2009, Japan is currently engaged in debate about the country’s medium-term greenhouse gas emission reduction targets covering the period 2013 to 2020. After considering public opinion and various other views, Prime Minister Taro Aso will decide on Japan’s medium-term targets this June. The nonprofit group Japan for Sustainability is asking people around the world for their comments, and then will …